Glass block



FIG. 1 is a top view of the glass block of the invention;

FIG. 2 is a front view of the glass block of FIG. 1;

FIG. 3 is a bottom view of the glass block of FIG. 1;

FIG. 4 is a first side view of the glass block of FIG. 1;

FIG. 5 is a back view of the glass block of FIG. 1; and,

FIG. 6 is a second side view of the glass block of FIG. 1. 

The ornamental design for the glass block, as shown. 